Process for drying microporous particles used in production of thermal insulating materials

摘要

In a process for drying microporous particles the heat necessary for raising the temperature is added convectively. Process for drying microporous particles containing fluid comprises reducing the boundary voltage of the fluid preferably to 0-1/10, especially 0-1/20 of the surface voltage of the fluid at room temperature until the temperature is raised corresponding to the sub-critical or close to critical pressure of the fluid. The heat necessary for raising the temperature is added convectively. Independent claims are also included for: (A) a process for producing microporous crosslinked particles comprising: (a) forming particles containing microporous pore fluid; (b) optionally washing and/or desalting the particles using solvent and/or water; (c) optionally partially or completely exchanging the pore fluid, solvent or water in the particles forming particles containing microporous fluid; (d) drying the particles and (e) optionally removing sorbed gases and/or materials of the dried particles; (B) an apparatus for carrying out the drying process comprising a pressure vessel with an inner vessel (1) and an outer vessel (2) as well as measuring and regulating devices and pumps and heat exchangers.